I agree with jBryan on this one, 4-AD is a SOLID product. I ran it last year at 4 tabs or 800mg daily. Honestly, I suggest 5 tabs for 1000mg.
This PH would be a great base for any DS or PH that causes lethargy and low libido.
800mg to 1000mg is where it's at. Might be pricey but if you don't...